1 /********************************************************************
3 * THIS FILE IS PART OF THE Ogg Vorbis SOFTWARE CODEC SOURCE CODE. *
4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
5 * THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE. *
6 * PLEASE READ THESE TERMS DISTRIBUTING. *
8 * THE OggSQUISH SOURCE CODE IS (C) COPYRIGHT 1994-2000 *
9 * by Monty <monty@xiph.org> and The XIPHOPHORUS Company *
10 * http://www.xiph.org/ *
12 ********************************************************************
14 function: channel mapping 0 implementation
15 last mod: $Id: mapping0.c,v 1.12 2000/05/08 20:49:49 xiphmont Exp $
17 ********************************************************************/
22 #include "vorbis/codec.h"
23 #include "vorbis/backends.h"
25 #include "bookinternal.h"
30 /* simplistic, wasteful way of doing this (unique lookup for each
31 mode/submapping); there should be a central repository for
32 identical lookups. That will require minor work, so I'm putting it
35 Why a lookup for each backend in a given mode? Because the
36 blocksize is set by the mode, and low backend lookups may require
37 parameters from other areas of the mode/mapping */
40 vorbis_info_mode *mode;
41 vorbis_info_mapping0 *map;
43 vorbis_look_time **time_look;
44 vorbis_look_floor **floor_look;
45 vorbis_look_residue **residue_look;
46 vorbis_look_psy *psy_look;
48 vorbis_func_time **time_func;
49 vorbis_func_floor **floor_func;
50 vorbis_func_residue **residue_func;
54 long lastframe; /* if a different mode is called, we need to
56 } vorbis_look_mapping0;
58 static void free_info(vorbis_info_mapping *i){
60 memset(i,0,sizeof(vorbis_info_mapping0));
65 static void free_look(vorbis_look_mapping *look){
67 vorbis_look_mapping0 *l=(vorbis_look_mapping0 *)look;
69 for(i=0;i<l->map->submaps;i++){
70 l->time_func[i]->free_look(l->time_look[i]);
71 l->floor_func[i]->free_look(l->floor_look[i]);
72 l->residue_func[i]->free_look(l->residue_look[i]);
73 if(l->psy_look)_vp_psy_clear(l->psy_look+i);
77 if(l->decay[i])free(l->decay[i]);
83 free(l->residue_func);
86 free(l->residue_look);
87 if(l->psy_look)free(l->psy_look);
88 memset(l,0,sizeof(vorbis_look_mapping0));
93 static vorbis_look_mapping *look(vorbis_dsp_state *vd,vorbis_info_mode *vm,
94 vorbis_info_mapping *m){
96 vorbis_info *vi=vd->vi;
97 vorbis_look_mapping0 *look=calloc(1,sizeof(vorbis_look_mapping0));
98 vorbis_info_mapping0 *info=look->map=(vorbis_info_mapping0 *)m;
101 look->time_look=calloc(info->submaps,sizeof(vorbis_look_time *));
102 look->floor_look=calloc(info->submaps,sizeof(vorbis_look_floor *));
103 look->residue_look=calloc(info->submaps,sizeof(vorbis_look_residue *));
104 if(vi->psys)look->psy_look=calloc(info->submaps,sizeof(vorbis_look_psy));
106 look->time_func=calloc(info->submaps,sizeof(vorbis_func_time *));
107 look->floor_func=calloc(info->submaps,sizeof(vorbis_func_floor *));
108 look->residue_func=calloc(info->submaps,sizeof(vorbis_func_residue *));
110 for(i=0;i<info->submaps;i++){
111 int timenum=info->timesubmap[i];
112 int floornum=info->floorsubmap[i];
113 int resnum=info->residuesubmap[i];
115 look->time_func[i]=_time_P[vi->time_type[timenum]];
116 look->time_look[i]=look->time_func[i]->
117 look(vd,vm,vi->time_param[timenum]);
118 look->floor_func[i]=_floor_P[vi->floor_type[floornum]];
119 look->floor_look[i]=look->floor_func[i]->
120 look(vd,vm,vi->floor_param[floornum]);
121 look->residue_func[i]=_residue_P[vi->residue_type[resnum]];
122 look->residue_look[i]=look->residue_func[i]->
123 look(vd,vm,vi->residue_param[resnum]);
126 int psynum=info->psysubmap[i];
127 _vp_psy_init(look->psy_look+i,vi->psy_param[psynum],
128 vi->blocksizes[vm->blockflag]/2,vi->rate);
132 look->ch=vi->channels;
134 look->decay=calloc(vi->channels,sizeof(double *));
135 for(i=0;i<vi->channels;i++)
136 look->decay[i]=calloc(vi->blocksizes[vm->blockflag]/2,sizeof(double));
142 static void pack(vorbis_info *vi,vorbis_info_mapping *vm,oggpack_buffer *opb){
144 vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)vm;
146 _oggpack_write(opb,info->submaps-1,4);
147 /* we don't write the channel submappings if we only have one... */
149 for(i=0;i<vi->channels;i++)
150 _oggpack_write(opb,info->chmuxlist[i],4);
152 for(i=0;i<info->submaps;i++){
153 _oggpack_write(opb,info->timesubmap[i],8);
154 _oggpack_write(opb,info->floorsubmap[i],8);
155 _oggpack_write(opb,info->residuesubmap[i],8);
159 /* also responsible for range checking */
160 static vorbis_info_mapping *unpack(vorbis_info *vi,oggpack_buffer *opb){
162 vorbis_info_mapping0 *info=calloc(1,sizeof(vorbis_info_mapping0));
163 memset(info,0,sizeof(vorbis_info_mapping0));
165 info->submaps=_oggpack_read(opb,4)+1;
168 for(i=0;i<vi->channels;i++){
169 info->chmuxlist[i]=_oggpack_read(opb,4);
170 if(info->chmuxlist[i]>=info->submaps)goto err_out;
173 for(i=0;i<info->submaps;i++){
174 info->timesubmap[i]=_oggpack_read(opb,8);
175 if(info->timesubmap[i]>=vi->times)goto err_out;
176 info->floorsubmap[i]=_oggpack_read(opb,8);
177 if(info->floorsubmap[i]>=vi->floors)goto err_out;
178 info->residuesubmap[i]=_oggpack_read(opb,8);
179 if(info->residuesubmap[i]>=vi->residues)goto err_out;
193 #include "envelope.h"
197 #include "spectrum.h"
200 /* no time mapping implementation for now */
202 static int forward(vorbis_block *vb,vorbis_look_mapping *l){
203 vorbis_dsp_state *vd=vb->vd;
204 vorbis_info *vi=vd->vi;
205 vorbis_look_mapping0 *look=(vorbis_look_mapping0 *)l;
206 vorbis_info_mapping0 *info=look->map;
207 vorbis_info_mode *mode=look->mode;
210 double *window=vd->window[vb->W][vb->lW][vb->nW][mode->windowtype];
212 double **pcmbundle=alloca(sizeof(double *)*vi->channels);
213 int *nonzero=alloca(sizeof(int)*vi->channels);
215 /* time domain pre-window: NONE IMPLEMENTED */
217 /* window the PCM data: takes PCM vector, vb; modifies PCM vector */
219 for(i=0;i<vi->channels;i++){
220 double *pcm=vb->pcm[i];
225 /* time-domain post-window: NONE IMPLEMENTED */
227 /* transform the PCM data; takes PCM vector, vb; modifies PCM vector */
228 /* only MDCT right now.... */
229 for(i=0;i<vi->channels;i++){
230 double *pcm=vb->pcm[i];
231 mdct_forward(vd->transform[vb->W][0],pcm,pcm);
235 double *floor=_vorbis_block_alloc(vb,n*sizeof(double)/2);
236 double *mask=_vorbis_block_alloc(vb,n*sizeof(double)/2);
238 for(i=0;i<vi->channels;i++){
239 double *pcm=vb->pcm[i];
240 double *decay=look->decay[i];
241 int submap=info->chmuxlist[i];
243 /* if some other mode/mapping was called last frame, our decay
244 accumulator is out of date. Clear it. */
245 if(look->lastframe+1 != vb->sequence)
246 memset(decay,0,n*sizeof(double)/2);
248 /* perform psychoacoustics; do masking */
249 _vp_compute_mask(look->psy_look+submap,pcm,floor,mask,decay);
251 _analysis_output("mdct",seq,pcm,n/2,0,1);
252 _analysis_output("lmdct",seq,pcm,n/2,0,0);
253 _analysis_output("prefloor",seq,floor,n/2,0,1);
255 /* perform floor encoding */
256 nonzero[i]=look->floor_func[submap]->
257 forward(vb,look->floor_look[submap],floor,floor);
259 _analysis_output("floor",seq,floor,n/2,0,1);
261 /* apply the floor, do optional noise levelling */
262 _vp_apply_floor(look->psy_look+submap,pcm,floor,mask);
264 _analysis_output("res",seq++,pcm,n/2,0,0);
272 sprintf(buffer,"residue_%d.vqd",vb->mode);
273 of=fopen(buffer,"a");
275 fprintf(of,"%g, ",pcm[i]);
283 /* perform residue encoding with residue mapping; this is
284 multiplexed. All the channels belonging to one submap are
285 encoded (values interleaved), then the next submap, etc */
287 for(i=0;i<info->submaps;i++){
289 for(j=0;j<vi->channels;j++){
290 if(info->chmuxlist[j]==i && nonzero[j]==1){
291 pcmbundle[ch_in_bundle++]=vb->pcm[j];
295 look->residue_func[i]->forward(vb,look->residue_look[i],
296 pcmbundle,ch_in_bundle);
300 look->lastframe=vb->sequence;
304 static int inverse(vorbis_block *vb,vorbis_look_mapping *l){
305 vorbis_dsp_state *vd=vb->vd;
306 vorbis_info *vi=vd->vi;
307 vorbis_look_mapping0 *look=(vorbis_look_mapping0 *)l;
308 vorbis_info_mapping0 *info=look->map;
309 vorbis_info_mode *mode=look->mode;
311 long n=vb->pcmend=vi->blocksizes[vb->W];
313 double *window=vd->window[vb->W][vb->lW][vb->nW][mode->windowtype];
314 double **pcmbundle=alloca(sizeof(double *)*vi->channels);
315 int *nonzero=alloca(sizeof(int)*vi->channels);
317 /* time domain information decode (note that applying the
318 information would have to happen later; we'll probably add a
319 function entry to the harness for that later */
320 /* NOT IMPLEMENTED */
322 /* recover the spectral envelope; store it in the PCM vector for now */
323 for(i=0;i<vi->channels;i++){
324 double *pcm=vb->pcm[i];
325 int submap=info->chmuxlist[i];
326 nonzero[i]=look->floor_func[submap]->
327 inverse(vb,look->floor_look[submap],pcm);
328 _analysis_output("ifloor",seq+i,pcm,n/2,0,1);
331 /* recover the residue, apply directly to the spectral envelope */
333 for(i=0;i<info->submaps;i++){
335 for(j=0;j<vi->channels;j++){
336 if(info->chmuxlist[j]==i && nonzero[j])
337 pcmbundle[ch_in_bundle++]=vb->pcm[j];
340 look->residue_func[i]->inverse(vb,look->residue_look[i],pcmbundle,ch_in_bundle);
343 /* transform the PCM data; takes PCM vector, vb; modifies PCM vector */
344 /* only MDCT right now.... */
345 for(i=0;i<vi->channels;i++){
346 double *pcm=vb->pcm[i];
347 _analysis_output("out",seq++,pcm,n/2,0,0);
348 mdct_backward(vd->transform[vb->W][0],pcm,pcm);
351 /* now apply the decoded pre-window time information */
352 /* NOT IMPLEMENTED */
354 /* window the data */
355 for(i=0;i<vi->channels;i++){
356 double *pcm=vb->pcm[i];
365 /* now apply the decoded post-window time information */
366 /* NOT IMPLEMENTED */
373 vorbis_func_mapping mapping0_exportbundle={
374 &pack,&unpack,&look,&free_info,&free_look,&forward,&inverse